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A check engine light can turn on for multiple reasons, one of which has to do with a part known as the oxygen sensor (O2 sensor). In order for your vehicle to move, the engine needs oxygen. By mixing a specific amount of oxygen with fuel, the engine creates a powerful explosion that pushes the car forward. If there's too much or too little oxygen, the vehicle won't run as efficiently.

What is an Oxygen Sensor?

An oxygen sensor is a part that detects the level of oxygen in the exhaust. Depending on the vehicle, there may be two or more O2 sensors present. When the oxygen sensors detect an abnormal amount of oxygen, they send an alert to the vehicle's computer. The computer can then adjust the amount of fuel going into the engine to keep everything running smoothly.

You can think of the oxygen sensors like tiny dogs inside the exhaust system. Their job is to sniff fumes that come out of the engine and send an alert if anything is off. Similar to how you use your nose to determine if something in the fridge is good or bad, the oxygen sensors "smell" the exhaust gases to detect if a "good" or "bad" amount of oxygen is present.

Why Would an Oxygen Sensor Trigger the Check Engine Light?

An oxygen sensor that doesn't work correctly is akin to having a dog with a stuffy nose. It can't smell the exhaust gases correctly, so it can't give the right information to the computer. This may result in the engine running less efficiently and the check engine light turning on to alert you that something isn't right.

Why Do Oxygen Sensors Fail?

There are many reasons an oxygen sensor can malfunction. Due to their location, it's possible for the O2 sensors to become covered by combustion byproducts. Foregoing maintenance can also cause O2 sensors to fail sooner rather than later. This is because preventive maintenance, such as replacing the air filter, reduces the amount of grime that might make its way to the sensors. There's also regular wear and tear. Oxygen sensors can last a long time, but they'll fail eventually. So if you drive a lot or your vehicle is older, it might simply be time to replace the oxygen sensors.

If your check engine light triggered because of an issue with one or more oxygen sensors, the team a Deltona Discount Tires can help. We provide engine diagnostics and repairs to keep the miles coming. Contact our auto repair shop in Egg Harbor Township today!